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Mine targets the right, but on Sunday I developed pain on the left side. It got so bad I had to visit the ER. They found no cause and after almost 8 hours, they discharged me with no diagnosis.

September 30
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That sounds like a really exhausting and frustrating experience — 8 hours in the ER with no answers is genuinely tough, and it's completely understandable to feel unsettled after that.

To answer your question: with generalized MG (gMG), muscle weakness doesn't typically stay neatly on one side. MG can affect muscles Show Full Answer

That sounds like a really exhausting and frustrating experience — 8 hours in the ER with no answers is genuinely tough, and it's completely understandable to feel unsettled after that.

To answer your question: with generalized MG (gMG), muscle weakness doesn't typically stay neatly on one side. MG can affect muscles throughout the body, and symptoms can shift and spread over time.

Here's how gMG muscle involvement can progress:

- It often starts in the face or eyes
- It can spread downward to the arms, hands, and legs
- It can affect muscles used for chewing, swallowing, and speaking
- Breathing muscles can also become involved in more severe cases

So experiencing symptoms on a different side than usual isn't out of the question with gMG. That said, the sudden severe pain you experienced on the left side that sent you to the ER deserves a proper follow-up — especially since no cause was found. It's really important to contact your neurologist as soon as possible to describe what happened.

It's also worth knowing that a sudden and severe worsening of MG symptoms can sometimes signal a myasthenic crisis, which is a medical emergency. Always seek immediate care if breathing becomes difficult.

Please don't let the ER discharge be the end of the conversation — loop in your neurologist right away.

September 30

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